EP 1249432 B1 20040204 - Process of manufacturing high capacity optical fibre preforms by MCVD
Title (en)
Process of manufacturing high capacity optical fibre preforms by MCVD
Title (de)
Verfahren zum Herstellen von Vorformen für optische Fasern mit hoher Kapazität mittels MCVD
Title (fr)
Procédé de fabrication de préformes de fibres optiques à grande capacité par MCVD
Publication
Application
Priority
FR 0104789 A 20010409
Abstract (en)
[origin: EP1249432A1] A silicon substrate tube (22) is doped with sufficient chlorine to obtain an OH concentration of less than 100 ppb and also with fluorine to obtain refractive index lower than the refractive index of the silica. The tube having inner cladding and optical core is collapsed to form a primary preform (24) and an outer cladding of silica is deposited over it.
IPC 1-7
IPC 8 full level
C03B 37/012 (2006.01); C03B 37/018 (2006.01)
CPC (source: EP US)
C03B 37/01205 (2013.01 - EP US); C03B 37/01291 (2013.01 - EP US); C03B 37/01892 (2013.01 - EP US); C03B 2201/075 (2013.01 - EP US); C03B 2201/12 (2013.01 - EP US); C03B 2201/20 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1249432 A1 20021016; EP 1249432 B1 20040204; AT E258903 T1 20040215; CN 1223533 C 20051019; CN 1380264 A 20021120; DE 60200195 D1 20040311; DE 60200195 T2 20040812; ES 2214465 T3 20040916; FR 2823198 A1 20021011; FR 2823198 B1 20030704; US 2002144521 A1 20021010; US 6988379 B2 20060124
DOCDB simple family (application)
EP 02290830 A 20020404; AT 02290830 T 20020404; CN 02106196 A 20020409; DE 60200195 T 20020404; ES 02290830 T 20020404; FR 0104789 A 20010409; US 11722802 A 20020408